Mallinckrodt (formerly HoltraChem)

The Mallinckrodt facility, formerly known as the HoltraChem Manufacturing Company, sits on 235 acres on the banks of the Penobscot River in Orrington, Maine. The plant operated under several owners from 1967 through 2000. The facility manufactured chlorine, sodium hydroxide (caustic soda), sodium hypochlorite (chlorine bleach), hydrochloric acid and chloropicrin (a pesticide). See site information for more.

Recent News

April 3, 2014 the Maine Supreme Judicial Court upheld the Maine Board of Environmental Protection’s Compliance Order for the Mallinckrodt site. The Board Order for the Mallinckrodt site requires the removal of two landfills and updated maintenance of the remaining three landfills; the removal of contaminated soils, sediments, and contaminated structures; and the treatment of groundwater and surface water. A number of studies are required as part of the implementation planning, as well as transportation infrastructure upgrades to support removal of contamination from the site. Implementation of the Order will begin this summer. Maine Supreme Judicial Court decision (pdf)

Activated carbon filters at the new waste water treatment plant

The new waste water treatment plant is now operational.


November 24, 2008 DEP Commissioner issued Compliance Order requiring Mallinckrodt to clean up the site

December 19, 2008 Mallinckrodt appealed Commissioner's Order to the Board of Environmental Protection (BEP)

January 25 to February 4, 2010 BEP held nine-day de novo evidentiary hearing

August 19, 2010 BEP denies Mallinckrodt appeal and upholds November 24, 2008 Commissioner Order with modifications

September 17, 2010 Mallinckrodt appeals BEP decision to court

October 31, 2012 the Maine Business and Consumer Court affirmed the Board of Environmental Protection clean up order in all respects. Court affirmed (pdf)

January 25, 2013 the Maine Business and Consumer Court dismissed the independent claim of Mallinckrodt and United States Surgical Corp. Court dismissed (pdf)

Inspections of Site April 1, 2010

Map of entire site (pdf format)

Map of Landfill 2 (pdf format)

2010 Groundwater excedances (pdf format)

CDM personnel taking a 24 hour sample for compliance with mercury standard

Corrective Action

Phases of Site Cleanup - The cleanup decision for the site is contained in two orders; a Commissioner Order dated November 24, 2008 and a Board of Environmental Protection Order dated August 19, 2010. Together these orders address actions to occur on the 235 acre site.

The two orders below combined constitute the Clean Up decision for the site.

ATSDR Health Consultation Summary Report (pdf format)

ATSDR Health Consultation Full Report (pdf format)

Air monitoring plan for the dismantling of the internal portions of the cell building.

Court Ordered Penobscot River Mercury Study

Please note: DEP is not part of this lawsuit or these studies. We provide these files for information only.

Phase I of the Study: 2006-2007 (pdf format)

Phase I Update Report - Part 1 May 2009 (pdf format)

Phase I Update Report - Part 2 May 2009 (pdf format)

Penobscot River Mercury Study, Final Report (April 2013)

For more information on the history or current status of this site, please contact Stacy Ladner (207)287-7853